stevens



(HUMMEL) E E 2 Smeets-smet 1.l

W. Y. OBER 8v E M. STEVENS.

SEAM PINISHING MACHINE.

No. 296,869'. PatentedApr. 15, 1884.

Mmm/J6 JM,

www l (No Model.) v 2 Sheets-Sheet 2.v

W. Y. BER 88 -F..M. STEVENS.v

9 SRAM PINISHING MACHINE.

No. 298,889. Patented Apr. 15, 1884.

N. PETERS. Pwwumnmphu. wnhingwn. l1 C.

3o the right in Fig. 1.

Unirse Sfrnrns PATENT @lirica W'ILLIAM Y. BER, OF LYNN, AND FRANK M.STEVENS, OF BGSTON, MASS.

SEANl-FINISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 296,869, dated April15, 1884. application inea July e, less. (No model.)

'To rtl/3 wtfmt it may concern.:

Be it known that we, WILLIAM Y. OBER, of Lynn, in the county of Essex,and FRANK M. STEVENS, of Boston, in the county of Suffolk,

and State ol' Massachusetts, have invented a '1o appended claims. l

This invention relates to a niachine that is adapted to rubbing down andsmoothing seams in leather and analogous materials; and the presentinvention is an improvement upon the.

I5 machine described and shown in said Obers application No. 95,531,filed May 19, 1883, for Letters Patent of the United States forImproveinentsinSeanrlinishingllachines,and is shown in thepresentdrawings in connection 2o with a machine mainly like that shownin the drawings filed in said Obers application; and

the present invention consists in the construe'- tion and combination ofdiver s devices embodied therein, as hereinafter more particularly andfully set forth and claimed.

In the accompanying drawings, Figure 1 is a side elevation of themachine with our i1nproveniente thereto applied. Fig. 2 is a frontelevation ofthe machine, taken as viewed from Fig. 3 is a detachedperspective view, showing the upper portion of the supportingwheel, thepressure-rolls resting thereon, and the means by which said rolls areniounted in position. Fig. 4 is a detached side elevation of the rubber,taken as viewed in Fig. 2. Fig. 5 is an edge elevation of the rubber,taken as viewed from the left in Figs. 2, et. Fig. 6 is an invertedperspective view ofthe rubber. Fig. 7 is an inverted plan view 4o of therubber.

In said views, c represents the frame or body ofthe machine, in whichisjournaled the lower arbor, b, on which are mounted the supportingwheelc at the front and the tangent-wheel d at i5* the rear. An upper arbonf,carries fast and loose pulleys g, through'which it is rotated by a belt,and also carries an endless screw,re, which engages wheel d, andthereby, through arbor b, rotates supportingwheel c. A head,

5o la, is carried by arin i, which is formed upon or rigidly secured tosleeve b', which is mounted on arbor b, as shown in Fig. l. Said sleeveis slightly rotated on the arbor by means of an eccentric secured onshaft f and acting in strap h, and through rod i and arm j, which latteris formed upon and entends from said sleeve b', and is pivotallyconnected with said rod c', whereby said head la is vibrated orreciprocated a limited distance along the periphery oiwheel c, asindicated by a dotted line in Fig. 2, which represents the axis of head7l'- when in its most advanced position to the left, all said devicesand their movements being fully shown and described in Obers said formerapplication, and which are referred to here merely for the purpose ofpreliminary illustration. In head cis seated the rubber s, which bearsby a yielding spring-pressure upon the periphery of wheel c, or the seamwhen interposed between the wheel and rubber, asis fully described andshown in Ob'ers said application. The lower end or operative face ofsaid rubber we form with two rounded ridges, no, with a depression, w,between them, and we form a central groove, fr, in ridge u, as shown inFigs. 5, (i, 7, and so as to be transverse to the line of said ridge,and in the direction of the planeur" wheel c when coacting therewith. Acurved arm, a', is pivoted in body a upon bolt t, and is controlled byspring d', which is attached to said arm and to adjustable plate c', asshown in Fig. l. Said arni at its upper and outer end is formed with ahead, z, in which is seated and secured by a set-screw, as shown,

the stem o', by the forks pp of which are pivotally supported the smallpressure-rolls u n, which, as shown in Figs. l, 2, 3, are arranged tobear upon the oblique faces of the periphery of wheel c, their axesbeing arranged slightly to the left, Fig. 2, ofthe extreme forwardmovement of rubber s, in order that the seemed' leather,.when carriedforward by said wheel in the direction indicated by the arrow thereon,shall be engaged by said rolls before rubber s begins to act upon it.Said supportingwheel, we forni with a central groove, which we iill withleather or other slightly-yielding niaterial, (shown at nu) which willinsure the desired frictional contact with thesearned leather that iscarried forward by the wheel when the machine is in use.

The practical operation of our machine is as follows: The seamed leatheris placed upon Wheel c, at the left of wheels a, as viewed in Fig. 2,with the line of the seam coincident with band m in wheel c, and ismoved forward and entered between said wheel and rolls, by which it isautomatically carried past rubber s, the seam moving in groove xtherein, thus serving to hold it centrally upon the wheel, and as theseam is carried forward, the ridge fu, formed across the face of therubber, flattens and smooths it to the level of the adjacent surface.Vhen the seamed leather encounters the rolls a, as just described, itis, by their pressure caused by spring d', curved transversely to theline of the seam, and so as to conform to the transverse configurationof the periphery of wheel c, thereby facilitating the "ly-yieldingmaterial, and also having the periperal face of the wheel, on` eithers/ide of said band, formed oblique to the plane ofthe wheel, whereby thecross-section of the face constitutes. an unbroken curved line,substantially as specied.

2. The supporting-wheel c, formed withV a central recess and insertedband, m, and with its periphery upon each side of said band obliquetoits plane7 substantially as specified.

3. In combination with supporting-wheel c and rubber 5,the small rolls nn, arranged to allow the seam to pass between them and to co-operatewith said wheel and rubber7 substantially as speciiied.

4. The combination, with the supportingwheel c, formed with a centralbearing, m, and an oblique peripheral face on each side thereof, ofrolls n n, arranged with their axes and peripheries coincident with theoblique faces of 45 said wheel, substantially as specified.

5. The rubber s, formed with a groove, x, extending partially but notwholly across its face, substantially as specified.

6. The rubber s, formed with the facial ridges 5o a o, and thedepression w between the same, substantially as specified.

7. The rubber s, formed with the facial ridge u, having the slot mtherein, and the ridge o, extending across the face of the rubber, sub-55 stantially as specified.

WILLIAM Y. OBER.

FRANK M. STEVENS.

Witnesses:

EUGENE HUMPHREY, T. W. PORTER.

